(function (window) {
  var Muuri = window.Muuri;
  var idList = utils.idList;

  QUnit.module('Grid methods');

  QUnit.test('getItems: should return the instance`s items', function (assert) {
    assert.expect(6);

    var done = assert.async();
    var container = utils.createGridElements();
    var grid = new Muuri(container);
    var items = grid.getItems();
    var teardown = function () {
      grid.destroy();
      container.parentNode.removeChild(container);
      done();
    };

    assert.notStrictEqual(
      idList(grid.getItems()),
      idList(grid._items),
      'should return a new array and not a reference to the internal array'
    );
    assert.deepEqual(
      idList(grid.getItems()),
      idList(grid._items),
      'should return all items in correct order if no arguments are provided'
    );
    assert.deepEqual(
      idList(grid.getItems(0)),
      idList([items[0]]),
      'should allow providing an index as the first argument'
    );
    assert.deepEqual(
      idList(grid.getItems(items[0].getElement())),
      idList([items[0]]),
      'should allow providing an element as the first argument'
    );
    assert.deepEqual(
      idList(grid.getItems(items[0])),
      idList([items[0]]),
      'should allow providing an item as the first argument'
    );
    assert.deepEqual(
      idList(grid.getItems([0, items[1].getElement(), items[2]])),
      idList([items[0], items[1], items[2]]),
      'should allow providing an array of indices, elements and items as the first argument'
    );

    teardown();
  });
})(this);
